Bull-screen cleaner.



A. PELL ERIN.

BULL SCREEN CLEANER.

APPLICATION FILED MAY s. 1918,

2 SHEETS--SHEET 1,275,299. Patented Aug. 13, 19111 v /s I ms mmms rrrzns0o. INOID-LIYNIL. wismuamn. n. c

A. PELLERIN.

FULL SCREEN CLEANER. APPLICATION FILED MAY 6, EH8,

Patented Aug. 13, 191&

2 $HEETSSHEET 2 D 0 o o n n D b v 0 0 0 0 A and I do hereby declare thatthe following is UNITED sT 'rnsrAT N orn o ADAM PELLERIN, or s'r. FLORE,QUEBEC, CANADA.

BULL-SCREEN CLEA ER.

subject of the King of Great Britain, re-

siding at St. Flore, Province of Quebec,

Canada, have invented certain new and useful Improvements in Bull-ScreenCleaners;

a full, clear, and exact description of the invention, such as willenable others skilled in v the art to which it appertains to make anduse the same. 7

The present invention relates to bull screens used for screening woodpulp in the manufacture of paper, and-an object of the 1 presentinvention isto provide a cleaner for such devices whereby thescreenwillbe autoinatically and thoroughly cleaned while the.

wood pulp is being screened.

With the above and other objects in view which will hereinafter appearas the description continues, the invention consists of the,

novel features of construction, combination .and formation of parts aswillbe hereinafter more fully described and particularly pointed out inthe appended claims.

In the accompanying drawings has been vshown a simple and preferred formof the invention, it being, however, understood that no limitation isnecessarily made to the precise structural details herein exhibited, but

1 thelright is hereby reservedv to any changes,

alterations or modifications to which recourse may. bie-had that comewithin the V scope of the claims withoutdeparting from efliciency of thesame. I 1 r I In the accompanying drawings: Figure 1 is ayerticalsection through .a bull screen having an embodiment of the presentinvention applied thereto;

thespirit of theinvention or sacrificing the the line 22 of Fig. 1;

Fig. 3

controlling valve; 1

' Fig. 4 is a similar view showing one of Fig. 2 is a horizontal sectiontaken on the partitions removed; and,

Fig. 5 is a vertical section through the valve.

Referring now more particularly to the accompanying drawings whereinlike and corresponding'parts are designated by similar referencecharacters throughout the several views. v

The numeral 1 indicates an ordinary bull screen having a plurality ofperforations 2 arranged in the bottom thereof which is of is a sideelevation of'the water Specification of Letters ratent. P t nted Aug.13,1918 Application filed May 6, 1918. Serial No. 232,723. i

the ordinary construction. Mountedabove I be rotated in the direction ofthe arrow as shown in Fig. 1 of the drawings. Keyed to this shaft 3 area pair of spaced hubs 5 and each of these hubs have two arms 6 "formedtherewith and the arms carried by each hub extend diametrically oppositebut at right angles to the arms carried by the adjacent hub. Pivotallymounted as at 7 within the outer ends of these arms 6 are the levers 8and theselevers each carry a wiper, 9. The opposite ends of the leversare connected to the arms 6 by means of the coil springs 10. While theshaft 3 is rotatingthe wipers 9 will be carried therewith and thesewipers will pass over the inner face of the screen 1, thereby clearingthe wood pulp from the perforations 2. After these wipers have passedover the perforations 2 it is then desired to cleanse the openings orremove the wood pulp contained therein by means of a suitable cleansingliquid such as water, and the wipers after passing over the screenshould also be cleansed so as to remove any wood pulp or celluloseadhered thereto. To supply this cleansing liquid to the screen and thewipers automatically and at the time desired, I provide the Sprayerswhich are connected to a valve whereby the Water or any other suitablecleansing'materialwill be supplied tothe Sprayers at the desired time.

Supported'fwithin the screen'l is a transverse bar or support 11 andmounted upon this bar 11 is a valve. This valv'e comprises a casingwhichconsists of a lower stationary section 12 which is secured to thebar 11 by means of the bolts13 and anupper or 'removable section 14which is connected to .the section 12'by means of'the bolts or othersuitable fastening members 15 These sections 12 and 13 havecorrespondingly inwardly projecting flanges 16 forming a compartment 17therebetween and a suitable supply pipe 18 is in communication with thiscompartment or channel way 17 Keyed to the shaft 3 is a hub havingformed there.

ssi

formed within the flanges 19 so as to prevent the water from leakingfrom the valve. The flanges 16"formed with the section 12- have formedtherein the elongatedslots 21 and 22 and the rotatable flanges 19 haveformed therein the openings '23 and 24 which are adapted to registerwith the rewith flexible portion 27,- so that'the sprayers 26 may passfreely over the inner face of thescreen 1. Communicating w th each otthe openings 2&"is a pipe 28' and each of "these pipes have formed withtheir outer-- ends a transversely extending perforated pipe or-sprayer29. Thesesprayers 29 are I arranged in front of the wipers 9 so as tocleanthe wipers after they haveleft the I woodpulp contained within thescreen.

- The operation of the device is as follows:

As the shaft is rotated the arnisgti will be carried-"therewith and therespective wipers '9 contact with the inner face of the screen they willclean or remove the Wood pulp from the openings 2. As ea'chopeningregisters with the slot 21 water will be supplied to the pipes 29 and inturn the sprayers 26 will be set for a spray of water which will cleanthe openings 2 after the wipers 9 have passed over these openings.

The slots2l are so arranged that the openings 23 will only communicatetherewith when the sprayers 26 are passing over the inner face of thescreen 1, but as the Wipers leave the screen the water will be cut offfrom the sprayers 26 until it again passes 4 shown at the right handside 'ofFig, 1, it

within the screen. Then one of the wipers aims assumed the position ofthe wiper as will be free of the wood pulp but afportion of the woodpulp or cellulose will adhere to the wipers as they pass'through thewood pulp, and as the wipers assume this position the pipes 28 will bebrought in communication With the slots 22 wherein the water will bepermittedto travel to the sprayers 29 and these sprayers will then exerta spray of water upon the Wipers wherebythey will an e be free of woodpulp before leaving the screen.

Having thus fully described my lnventlon,

what Iclaim as new and desire to secure by Letters Patent is:

1. In a bull screen cleaner the combination of a screen, a driving shaftmounted abovesaid-screen, wipers carried by said shaft and adapted tocontact with said screen, and sprayers arranged in.front and in thebackof each of saidaviperssubstantially-as and for thepurpose specified.

- 2. The-combination Witha bull screen, of

a rotatable shaft mounted thereupon, wipers c'a'rriedbysaid shaft andadapted to contact with said screen, a supply'pipe, 'a valve arranged{within said supply pipe, sprayers carried by saidsha'ft and in'comiminication withsaid supply pipe, and said: shaft adapted to operatesaid valve substantially as and for the purpose specified.

3. The-combination with a bull screen having-a plurality of-perforations therein, of a driven shaft mounted above said screen, aplurality of arms carried by said shaft, a wiper carried by each; ofsaid arms and adapted to contact with said-screen, sprayers carriedbysaid shaftand arranged adjacent to said wipers, a supply pipecomn'nnncatmg with said'sprayeraa Valve arranged'within said supplypipe, and said shaft being 'operatively connected to said valve.

1. Tl'iecombination with a bull screen, of adriven shaft mounted abovesaid bull screen, a plurality of arms'carried by said shaft, afiexiblewiper carried by the outer end of each of said arms, said wipers adaptedto contact with saidscreen, sprayers car- "ried by said shaft andadapted to rest adjacent said'wipers, a supply pipe, a rotatable valvearranged within said supply pipe, means for operatively connecting saidvalve with said shaft, said sprayers beings in communication with "said"supply pipe and means whereby upon the rotation of said shaft said valvewill be opened and closed for supplying water tosaid sprayerssubstantially as and for the purpose set forth. In witness whereof Ihave hereunto set my hand.

ADAM PELLnnIN.

fiomea'ofthiapatent may be obtained for five cents each, by addressingthe ffiommissionrfofifi'atenta,

'- -washi'flgtongh. O.

